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<blockquote data-quote="Thnking" data-source="post: 2635085" data-attributes="member: 571105">Under 250-300hz is a non-sensitive frequency region to humans.&nbsp; We can’t locate the sound on the azimuth (horizontally) within these frequencies.&nbsp; There definitely aren&#039;t any front- to- back or vertical cues within those frequency ranges.&nbsp; Someone could mount a speaker reproducing 200hz with an acoustical stop band of 36db/oct behind them and never be able to discern a point source location from it.For mid-bass duty speakers, usually people have them reproducing above 250 hz.&nbsp; It&#039;s ideal to properly aim them for horizontal localization.&nbsp; Moving them up an down is only going to change the DB level, it&#039;s not going to change the height of the music at all.As far as time alignment goes, typically it&#039;s the lesser of 2 evils.&nbsp; Tweeters need to be mounted high, because they dominate vertical localization and depth localization.&nbsp; It&#039;s close to impossible in a lot of car&#039;s to mount the mid that high.&nbsp; I choose time alignment over lowering my tweeter for combining the point sources.Phase shifts associated with delaying signals to realign the source point time, aren&#039;t audible.</blockquote>

[QUOTE="Thnking, post: 2635085, member: 571105"] Under 250-300hz is a non-sensitive frequency region to humans. We can’t locate the sound on the azimuth (horizontally) within these frequencies. There definitely aren't any front- to- back or vertical cues within those frequency ranges. Someone could mount a speaker reproducing 200hz with an acoustical stop band of 36db/oct behind them and never be able to discern a point source location from it. For mid-bass duty speakers, usually people have them reproducing above 250 hz. It's ideal to properly aim them for horizontal localization. Moving them up an down is only going to change the DB level, it's not going to change the height of the music at all. As far as time alignment goes, typically it's the lesser of 2 evils. Tweeters need to be mounted high, because they dominate vertical localization and depth localization. It's close to impossible in a lot of car's to mount the mid that high. I choose time alignment over lowering my tweeter for combining the point sources. Phase shifts associated with delaying signals to realign the source point time, aren't audible. [/QUOTE]

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